Practical guides for developers
No fluff — just the answer, a code example, and a free tool that does the job in your browser.
Latest guide
encodeURI is for a whole URL, encodeURIComponent is for one value inside it. Mix them up and you get broken links or %2520 double-encoding.
October 14, 2026 · 5 min read · Shayan
Read guide →If your fetch call fails with 'Unexpected token < is not valid JSON', your API returned an HTML page, not JSON. Here is how to prove it and fix it.
October 14, 2026 · 5 min read · Shayan
Every LLM charges by the token and thinks in a fixed-size window. Learn what a token is, why the count matters, and how to estimate it before you send.
October 14, 2026 · 5 min read · Shayan
A phone photo is 3–6 MB. Learn the three levers — format, quality, dimensions — that shrink it by 80% with no visible difference.
October 14, 2026 · 5 min read · Shayan
Base64 looks like encryption, but it is not. Learn how the encoding works, how to do it safely in JavaScript, and when to reach for it.
October 14, 2026 · 4 min read · Shayan
Every codebase mixes naming conventions. Learn the five cases, why each language picks its own, and the edge cases that break naive converters.
October 14, 2026 · 4 min read · Shayan
Regex looks like keyboard noise, but twenty percent of it covers ninety percent of real tasks. Learn literals, methods, flags, and the three traps everyone hits.
October 14, 2026 · 4 min read · Shayan
JSON.stringify does more than you think. Learn how to pretty-print, minify, validate, and sort JSON in plain JavaScript.
October 14, 2026 · 4 min read · Shayan
A JWT is three Base64 segments separated by dots. Learn what each part does, how to decode the payload, and what never to trust.
October 14, 2026 · 4 min read · Shayan
iPhones save photos as HEIC, and half the web still wants JPG. Here are the fastest ways to convert — including one that never uploads your photos.
October 14, 2026 · 4 min read · Shayan
Pixels ignore your users' font-size settings. REM units respect them. Learn the conversion, when REM wins, and when PX is still fine.
October 14, 2026 · 4 min read · Shayan
Every photo you share can carry your GPS location, device, and timestamps in hidden EXIF metadata. Learn what it contains and how to strip it.
October 14, 2026 · 4 min read · Shayan
ByteTips is a blog of short, practical how-to guides for developers. Each guide answers one real question — how to format JSON in JavaScript, how to decode a JWT safely, how to convert HEIC photos to JPG — and gives you the answer up front, a code example you can copy, and a free tool that does the job in your browser. No long intros, no filler, no sign-up. The guides are written for working developers who need a real answer fast, whether you are debugging a broken fetch call at midnight or learning a new API for the first time.
Every post links to a free tool on Byte-Kit that runs entirely in your browser, so nothing you paste ever leaves your device. That privacy-first approach is the whole point: your tokens, your photos, and your data stay on your machine. ByteTips covers the everyday tasks developers actually search for — JSON, encoding, images, CSS units, regex, and more — with practical steps you can follow in minutes. A new practical guide lands here every week, each one short enough to read in five minutes and complete enough to solve the problem the same day.
Start with the guide that matches your problem. Read the short answer at the top, copy the code example, and try the linked tool to see the result on your own input. If the guide mentions a second tool, that is the natural next step — for example, the JSON formatter pairs with the JSON guide, and the URL encoder pairs with the encoding guide. Each guide takes about five minutes to read, and the tools are free to use without an account. If a guide helped you, bookmark ByteTips and come back the next time a real question pops up.